diff options
| author | Nagaraju, Vathsala <vathsala.nagaraju@intel.com> | 2017-01-02 17:00:58 +0530 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-01-12 16:35:20 -0800 |
| commit | 340c93c0a32acc916bb7655926398b8591e0a30b (patch) | |
| tree | 2b6c6b77f03acbab1ad9d64f7d851f4fbbe1377b /drivers | |
| parent | f40c484b78a3f9d4e469a11e7c6047ea6cb6f3b6 (diff) | |
drm/i915/psr: enable ALPM for psr2
As per edp1.4 spec , alpm is required for psr2 operation as it's
used for all psr2 main link power down management and alpm enable
bit must be set for psr2 operation.
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: vathsala nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: Patil Deepti <deepti.patil@intel.com>
Reviewed-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1483356663-32668-6-git-send-email-vathsala.nagaraju@intel.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_psr.c | 6 |
3 files changed, 16 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 234c5890134f..1cd485c314e6 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1156,6 +1156,7 @@ struct i915_psr { bool link_standby; bool y_cord_support; bool colorimetry_support; + bool alpm; }; enum intel_pch { diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 343e1d9fa761..4f33115f5ca3 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3060,6 +3060,14 @@ static bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp) return dprx & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED; } +bool intel_dp_get_alpm_status(struct intel_dp *intel_dp) +{ + uint8_t alpm_caps = 0; + + drm_dp_dpcd_readb(&intel_dp->aux, DP_RECEIVER_ALPM_CAP, &alpm_caps); + return alpm_caps & DP_ALPM_CAP; +} + /* These are source-specific values. */ uint8_t intel_dp_voltage_max(struct intel_dp *intel_dp) @@ -3644,6 +3652,8 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp) intel_dp_get_y_cord_status(intel_dp); dev_priv->psr.colorimetry_support = intel_dp_get_colorimetry_status(intel_dp); + dev_priv->psr.alpm = + intel_dp_get_alpm_status(intel_dp); } } diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index d57ec780959a..36c404511883 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -209,7 +209,11 @@ static void hsw_psr_enable_sink(struct intel_dp *intel_dp) drm_dp_dpcd_writeb(&intel_dp->aux, DP_SINK_DEVICE_AUX_FRAME_SYNC_CONF, DP_AUX_FRAME_SYNC_ENABLE); - + /* Enable ALPM at sink for psr2 */ + if (dev_priv->psr.psr2_support && dev_priv->psr.alpm) + drm_dp_dpcd_writeb(&intel_dp->aux, + DP_RECEIVER_ALPM_CONFIG, + DP_ALPM_ENABLE); if (dev_priv->psr.link_standby) drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE); |